From: Avi Kivity <avi@redhat.com>
To: Alexander Graf <agraf@suse.de>
Cc: Scott Wood <scottwood@freescale.com>,
"linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>,
Paul Mackerras <paulus@samba.org>,
"kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [RFC PATCH 17/17] KVM: PPC: Add an ioctl for userspace to select which platform to emulate
Date: Mon, 04 Jul 2011 14:37:53 +0300 [thread overview]
Message-ID: <4E11A611.3010904@redhat.com> (raw)
In-Reply-To: <BC4ECEFA-15A4-49A9-AE53-9635F3F6F996@suse.de>
On 07/04/2011 02:36 PM, Alexander Graf wrote:
> >
> > What intermediate steps? We can't add fields to the structure before we get the extensibility infrastructure, but that's all.
>
> If we add it now without extensibility code, we will have a kernel that only knows the ioctl with the size as it is now. If we later add another field, the ioctl size changes which would render new user space running on that particular kernel to fail, because it doesn't have the "just truncate the ioctl param to the size" logic yet.
You're right. So let's add the padding now, and only use the great new
stuff after it's actually in.
Working ugly is better than broken pretty.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-07-04 11:38 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-29 10:15 [PATCH 0/17] Hypervisor-mode KVM on POWER7 and PPC970 Paul Mackerras
2011-06-29 10:16 ` [PATCH 01/17] KVM: PPC: Fix machine checks on 32-bit Book3S Paul Mackerras
2011-07-01 10:08 ` Alexander Graf
2011-06-29 10:17 ` [PATCH 02/17] KVM: PPC: Move fields between struct kvm_vcpu_arch and kvmppc_vcpu_book3s Paul Mackerras
2011-06-29 10:17 ` [PATCH 03/17] KVM: PPC: Split out code from book3s.c into book3s_pr.c Paul Mackerras
2011-06-29 10:18 ` [PATCH 04/17] powerpc, KVM: Rework KVM checks in first-level interrupt handlers Paul Mackerras
2011-06-29 10:18 ` [PATCH 05/17] KVM: PPC: Deliver program interrupts right away instead of queueing them Paul Mackerras
2011-07-01 11:47 ` Alexander Graf
2011-06-29 10:19 ` [PATCH 06/17] KVM: PPC: Pass init/destroy vm and prepare/commit memory region ops down Paul Mackerras
2011-06-29 10:19 ` [PATCH 07/17] KVM: PPC: Move guest enter/exit down into subarch-specific code Paul Mackerras
2011-06-29 10:20 ` [PATCH 08/17] powerpc: Set up LPCR for running guest partitions Paul Mackerras
2011-06-29 10:20 ` [PATCH 09/17] KVM: PPC: Split host-state fields out of kvmppc_book3s_shadow_vcpu Paul Mackerras
2011-06-29 10:21 ` [PATCH 10/17] KVM: PPC: Add support for Book3S processors in hypervisor mode Paul Mackerras
2011-07-01 18:37 ` Dave Hansen
2011-07-01 19:12 ` Alexander Graf
2011-07-04 11:51 ` Paul Mackerras
2011-06-29 10:22 ` [PATCH 11/17] KVM: PPC: Handle some PAPR hcalls in the kernel Paul Mackerras
2011-06-29 10:22 ` [PATCH 12/17] KVM: PPC: Accelerate H_PUT_TCE by implementing it in real mode Paul Mackerras
2011-06-29 10:23 ` [PATCH 13/17] KVM: PPC: Allow book3s_hv guests to use SMT processor modes Paul Mackerras
2012-04-16 9:45 ` Alexander Graf
2012-04-16 12:13 ` Paul Mackerras
2012-04-16 13:01 ` Alexander Graf
2011-06-29 10:25 ` [PATCH 14/17] KVM: PPC: Allocate RMAs (Real Mode Areas) at boot for use by guests Paul Mackerras
2011-06-29 10:26 ` [PATCH 15/17] powerpc, KVM: Split HVMODE_206 cpu feature bit into separate HV and architecture bits Paul Mackerras
2011-06-29 10:40 ` [PATCH 16/17] KVM: PPC: book3s_hv: Add support for PPC970-family processors Paul Mackerras
2011-06-29 10:41 ` [RFC PATCH 17/17] KVM: PPC: Add an ioctl for userspace to select which platform to emulate Paul Mackerras
2011-06-29 11:53 ` Josh Boyer
2011-06-29 11:56 ` Alexander Graf
2011-06-29 11:58 ` Josh Boyer
2011-06-30 8:34 ` Avi Kivity
2011-06-30 15:04 ` Alexander Graf
2011-06-30 15:16 ` Avi Kivity
2011-06-30 15:22 ` Alexander Graf
2011-06-30 16:00 ` Avi Kivity
2011-06-30 16:33 ` Alexander Graf
2011-07-03 8:15 ` Avi Kivity
2011-07-03 8:34 ` Alexander Graf
2011-07-03 8:56 ` Avi Kivity
2011-07-03 9:00 ` Alexander Graf
2011-07-03 9:05 ` Avi Kivity
2011-07-03 9:09 ` Alexander Graf
2011-07-03 9:12 ` Avi Kivity
2011-07-04 10:59 ` Alexander Graf
2011-07-04 11:22 ` Avi Kivity
2011-07-04 11:36 ` Alexander Graf
2011-07-04 11:37 ` Avi Kivity [this message]
2011-07-04 11:41 ` Alexander Graf
2011-06-30 23:13 ` Benjamin Herrenschmidt
2011-07-01 10:09 ` Paul Mackerras
2011-07-01 10:23 ` Alexander Graf
2011-07-01 18:24 ` [PATCH 0/17] Hypervisor-mode KVM on POWER7 and PPC970 Alexander Graf
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